New formatting directive in logfile naming: &P for port number.

Users have requested this from time to time, for distinguishing log
file names when there's more than one SSH server running on different
ports of the same host. Since we do take account of that possibility
in other areas (e.g. we cache host keys indexed by (host,port) rather
than just host), it doesn't seem unreasonable to do so here too.

(cherry picked from commit 0550943b51c538400e31ce18483032e446178120)

1 files changed, 10 insertions, 4 deletions

diff --git a/logging.c b/logging.c
index 26634f77..b57888fd 100644
--- a/logging.c
+++ b/logging.c
@@ -22,7 +22,8 @@ struct LogContext {
     int logtype;		       /* cached out of conf */
 };
 
-static Filename *xlatlognam(Filename *s, char *hostname, struct tm *tm);
+static Filename *xlatlognam(Filename *s, char *hostname, int port,
+                            struct tm *tm);
 
 /*
  * Internal wrapper function which must be called for _all_ output
@@ -159,7 +160,8 @@ void logfopen(void *handle)
         filename_free(ctx->currlogfilename);
     ctx->currlogfilename = 
         xlatlognam(conf_get_filename(ctx->conf, CONF_logfilename),
-                   conf_get_str(ctx->conf, CONF_host), &tm);
+                   conf_get_str(ctx->conf, CONF_host),
+                   conf_get_int(ctx->conf, CONF_port), &tm);
 
     ctx->lgfp = f_open(ctx->currlogfilename, "r", FALSE);  /* file already present? */
     if (ctx->lgfp) {
@@ -408,9 +410,10 @@ void log_reconfig(void *handle, Conf *conf)
  *
  * "&Y":YYYY   "&m":MM   "&d":DD   "&T":hhmmss   "&h":<hostname>   "&&":&
  */
-static Filename *xlatlognam(Filename *src, char *hostname, struct tm *tm)
+static Filename *xlatlognam(Filename *src, char *hostname, int port,
+                            struct tm *tm)
 {
-    char buf[10], *bufp;
+    char buf[32], *bufp;
     int size;
     char *buffer;
     int buflen, bufsize;
@@ -446,6 +449,9 @@ static Filename *xlatlognam(Filename *src, char *hostname, struct tm *tm)
 		bufp = hostname;
 		size = strlen(bufp);
 		break;
+	      case 'p':
+                size = sprintf(buf, "%d", port);
+		break;
 	      default:
 		buf[0] = '&';
 		size = 1;